Substituted amino acetamido penicillins

ABSTRACT

This invention relates to new penicillin derivatives and methods for preparing the same, said derivatives having the structure   and   wherein Z is hydrogen, lower alkyl or a salt forming ion and R is aryl, substituted aryl, lower alkyl or cycloalkyl. These compounds are useful as antibacterial agents.

' United States Patent 91 Lee et a1.

[451 Sept. 16, 1975 SUBSTITUTED AMINO ACETAMIDO liENlclLuNs [75] Inventors: Bong Kuk Lee, Old Bridge; Dewey t D. Y. Ryu; Gennaro John Miraglia, A; I both of East Brunswick; Harold l. Basch, Somerset; Barid B.

Mukherjee, East Windsor, all of NJ.

[73] Assignee: E. R. Squibb & Sons, Inc.,

Princeton, NJ.

22 Filed: May 26,1972

21 Appl.No.: 257,256

Primary Examiner-Nicholas S. Rizzo Attorney, Agent, or FirmLawrence S. Levinson; Merle J. Smith; Stephen B. Davis [57] ABSTRACT This invention relates to new penicillinderivatives and methods for preparing the same, said derivatives having the structure 3 ll f CH-C-NHA N 1 cooz in and I? S CH3 CH-C-NH/ 1 1 /I N NH cooz wherein Z is hydrogen, lower alkyl or a salt forming ion and R is aryl, substituted aryl, lower alkyl or cycloalkyl. These compounds are: useful as antibacterial agents.

7 Claims, No Drawings SUBSTITUTED ANIINO ACETAMIDO PENICILLINS This invention relates to newpenicillin derivatives of 5 the formula 1 l1 1 --CH--CNH 3 I Q 600;

wherein Z is hydrogen, lower alkyl or a salt forming ion e. g., an alkali metal as sodium or potassium,v an alkaline earth metal like calcium or magnesium, or that of an organic base like dibenzylamine, N,N-dibenzylethylenediamine or the like, and Q is l\l=Cl-IR or NH-CH R wherein R is aryl, substituted aryl, lower alkyl or cycloalkyl.

Thus, the penicillin derivatives of the invention include the following sub-genusesz The lower alkyl groups represented by the above R groups include straight or branched chain aliphatic hydrocarbon radicals having up to seven carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tbutyl, amyl, hexyl, heptyl, and the like. The lower alkyl groups can include as substituents any of the aryl groups mentioned below as well as halogen (Cl, Br, I or F).

The term aryl includes monocyclic or bicyclic monovalent aromatic ring systems such as phenyl or naphthyl. These aryl radicals can include as substituents at the ortho-position halogen, hydroxy, alkanoic acid, lower alkoxy, amido or any of the alkyl groups mentioned hereinbefore.

and

OCH

The term cycloalkyl includes monocyclic carbocyclic radicals having from 3 to about 6 carho ns such as cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl.

The compoundsof Formula II can be prepared by reacting a compound of the structure with analdehyde of the structure V RCH to form compounds of the structure S CH3 -CHCNH I a. '11 CH N cooz o In carrying out the above reaction, the reaction of compound IV with the aldehyde V is preferably carried out in an aqueous media such as in a mixture of water with a lower alkanol such as methanol, ethanol or npropanol, or ketones such as methylethyl ketone or methyl isobutyl ketone. The reaction may be carried at temperatures ranging from about to about 40C. Compound IV is employed in a ratio to Compound V within the range of from about 1:1 to about 1:3, preferably from about 1:1 to about 111.5 and optimally at about 1:1.1.

Compounds of formula 11 can also he prepared by reacting a compound of the formula Vll with an aldehyde of formula V to form a compound of the formula Vlll and thereafter reacting Vlll with an acid halide compound of the structure 1X xco alkyl to form a mixed anhydride of the structure R which is reacted with' 6-APA (i.e. 6-amino penicillanic acid) or an ester or salt thereof to form the formula 11 compounds.

The reaction of Compound Vll with the aldehyde (V) is carried out in the presence of an aqueousalcoholic solvent, such as a mixture of water and methanol, at temperatures ranging from ambient temperature to.the boiling point of the solvent. Compound Vll can be employed in a molar ratio to the aldehyde (V) within the range of from about 1:1 to about 1:3 and preferably from about 1:1 to about 111.5.

The reaction of compounds V111 and 1X is carried out in a mixture of solvents such as acetone, dioxane and lutidine at temperatures ranging from about -10 to about 20C and preferably from about 10 to about 10C, employing a molar ratio of lX:VlIl within the range of from about 1:1 to about 3:1 preferably 1.1:] to 1.5:1.

The reaction of the'mixed anhydride X with 6-APA is carried out in an aqueous solvent such as aqueous sodiumbicarbonate at a temperature with the range of from about l5 to about 5C and preferably from about 5 to about 0C employing a molar ratio of X:Xl within the range of from about 1:0.8 to about 2:1 and preferably from about 1.1:1 to about 1.5: 1.

Compounds of formula VI can be reduced by reacting V1 with a reducing agent such as sodium borohydride, aluminum borohydride, lithium aluminum hydride, or hydrogen in conjunction with a catalyst for reduction such as platinum or palldium to form Compounds of the structure The above reduction can be carried out in water or aqueous solvents, such as aqueous potassium phosphate, at temperatures ranging from about 0 to about 40C and preferably from about 10 to about 20C employing a molar ratio of Compound 11 to reducing agent within the range from about 1:2 to about 1:10 and preferably fromabout 1:4 to about 1:6.

Alternatively, the formula III compounds can be prepared by forming compounds of formula Vlll above, reducing the formula Vlll compound by reacting it with any of the aforementioned reducing agents to form a compound of the formula R and thereafter reacting Xll with an acid halide of struc- XIl ture 1X to form the mixed anhydide of formula X111.

which can be reacted with 6-APA (formula XI) to form the formula [11 compounds.

It will be appreciated that essentially the same reaction conditions as set out with respect to the reaction of Compounds Vlll, IX, X and X1, apply here as well.

The starting materials of structure IV are disclosed in US. Pat. No. 3,485,819 to Weisenborn, et al. and are prepared by coupling a compound of the structure as described in US. Pat. No. 3,485,819.

Examples of aldehydes which can be employed herein as starting materials include, but are not limited to, the following H C=O F CH C) n C H CHO The products of this invention form salts which are also part of the invention. Basic salts form with the acid moiety as discussed above in connection with the symbol Z. Acid addition salts also form with the a-amino nitrogen. Such acid salts include, for example, inorganic salts such as the hydrohalides, e.g., hydrobromide, hydrochloride, hydroiodide, sulfate, nitrate, phosphate, borate, etc., and organic salts such as acetate, oxalate, tartrate, malate, citrate, succinate, benzoate, ascorbate, methanesulfonate and the like. It is frequently convenient to isolate and purify the product by forming a soluble or insoluble salt, as desired, then regenerating the free compound, by neutralization, for example.

The compounds of this invention have a broad spectrum of antibacterial activity against both gram positive and gram negative organisms such as Staphylococcus aureus, Salmonella schottmuelleri, Pseudomanas aeruginosa, Proteus vulgaris, Escherichia coli and Streptococcus pyrogenes. They may be used as antibacterial agents in a prophylactic manner, e.g., in cleaning or disinfecting compositions, or otherwise to combat infections due to organisms such as those named above, and in general may be utilized in a manner similar to penicillin G and other penicillins and cephalosporins. For example, a compound of Formula 1 or a physiologically acceptable salt thereof may be used in various animal species in an amount of about 0.1 to 100 mg./kg. daily, orally or parenterally, in single or two to four divided doses to treat infections of bacterial origin. By way of illustration the PD orally in micein a single administration is 1.3 mg./kg. against Streptococcus, 8.6 mg./kg. against Proteus and 11.8 mg./kg. against Salmonella, respectively. Up to about 600 mg. of a compound of Formula I or a salt thereof may be incorporated in an oral dosage form such as tablets, capsules or elixirs or in an injectable form in a sterile aqueous vehicle prepared according to conventional pharmaceutical practice. In cleaning or disinfecting compositions, e.g., in barns or dairy equipment, a concentration of about 0.01 to 1% by weight of such compounds admixed with, suspended or dissolved in conventional inert dry or aqueous carriers for application by washing or spraying may be used.

The following examples are illustrative of the invention. All temperatures are on the Centigrade scale.

EXAMPLE 1 6-[ 2-( l ,4-Cyclohexadien-l-yl)-2-[[(2-hydroxy-1- naphthyl )methylene]amino]acetamido]-3,3-dimethyl- 7-oxo-4-thial -azabicyclo[ 3.2.0]heptene-2-carboxylic acid, sodium salt 712.4 mg. (4.2 millimoles) of 2-hydroxy-1-naph-' thaldehyde is added to the sodium salt solution, and the reaction mixture is stirred for 18 hours at about 10C. Methanol is removed at less than 10C in vacuo, and the remaining aqueous solution lyophilized to obtain 2,125 mg. (98%) yield of a greenish yellow solid.

EXAMPLE 2 6-[2-( 1 ,4-Cyclohexadien-1-yl)-2-[ (2-hydroxylnaphthyl)methyl]amino]acetamido]-3,3-dimethyl-7- oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, sodium salt I 1 2,000 mg. (3.6 millimoles) of the product of Example 1 is dissolved in 150 ml of potassium phosphate buffer (0.05 M, pH 6), and to this solution is added 455 mg. (12 millimoles) of NaBl-L, dissolved in 15 ml H O, dropwise, for 1 hour with vigorous stirring, in ice bath. The reaction mixture is acidified to .pH 3 with 1 N HCl, and the resultant solid isolated by filtration and washed 'with cold water. The product is a white solid weighing 502 mg. after drying. The resulting solid, 409 mg. (0.79

8 millimole), and 75.6 mg. (0.9 millimole) of Nal-ICO are dissolved in a mixture of 10 ml H 0 and 100 ml methanol. The methanol is removed in vacuo at a temperature below 10C, and the aqueous portionlyophilized to' yield 403 mg. of light brownish solid.

EXAMPLE 3 6-[2-( 1 ,4-Cyclohexadien- 1 -yl )-2-[ 2-hydroxy- 1 -naphthyl)- methyamino]acetamido]-3 ,3-dimethyl-7-oxo-4-thia-1- azabicyclo[3.2.0]heptane-Z-carboxylic acid, sodium salt A suspension of the sodium salt of D-2-amino-2-( 1,4- cyclohexadienyl)-acetic acid 1.75 g. l0 millimoles) and 2-hydroxy-1-naphthaldehyde 3.44 g. (20 millimoles) in a mixture of ethanol (250 ml.) and methanol (20 ml.) is refluxed for 2 hours. The mixture is then evaporated under reduced pressure and the residue is washed with ether and recrystallized from ethanol to give crystals of the sodium salt of (1,4-cyclohexadien- 1-yl)[ [(2-hydroxy-1-naphthyl)methylene]amino]acetic acid 3.11 g. yield).

This N-protected amino acid 2.63 g. (8 millimoles) is dissolved in a mixture of dry acetone ml.), dioxane (25 ml.) and 2,6-lutidine (1.35 ml.). The solution is rapidly chilled to -5, treated with ethyl chlorocarbonate 0.955 mg. (0.84 ml., 8.8 millimoles) and stirred at 0 for 10 minutes, during which lutidine hydrochloride is precipitated and the mixed anhydride formed in solution. The suspension is then cooled to -45 and stirred vigorously while an ice-cold solution of 6-APA 1,305 mg. (6.1 millimoles) in 3% aqueous sodium bicarbonate (28 ml.) is added as rapidly as possible, the temperature of the mixture never being allowed to rise above 0. The resulting solution is stirred for 30 minutes at 0 and then for a further 30 minutes without external cooling. It is then extracted with ether (3 X ml.), only the aqueous phase being retained. The latter is brought to pH 2 by addition of dilute hydrochloric acid and rapidly extracted with ether (100 ml. in 3 portions). These second ether extracts, containing the N- protected penicillin are washed with water 10 ml.) and then extracted with sufficient 3% sodium bicarbonate to give a neutral aqueous phase, which is separated and evaporated at low temperature and pressure. The residue is shown, by paper chromatography of a small portion, to contain the sodium salt of the penicillin of the above title.

EXAMPLES 4 to 12 N H COOZ R Table l Example Column Column No. A B

Aldehyde (RCHO) Product as in column A CHO CH 8 @OCH3 9 c n cuo 10 c n cuo 1| ACHO l2 CHO EXAMPLES 13 to 2] Employing the procedure described in Example 2, but substituting as the starting material, the products of Examples 4 to 12, the products set out in 'ljable 11 below are obtained.

LCQHT EXAMPLES 22 to 30 Employing the procedure of Example 3, but substituting the starting material set out in column A of Table [11 below, the product shown in column B thereof is obtained.

Table III Product Starting Material CHJ H CH4 H H JY N C R m 4 H H C N C R Table Ill cooz Example No.

as per column A w w w phenyl, naphthyl, or ortho substituted phenyl or naphthyl wherein said substituent is halogen, hydroxy, car- 23 boxy], amido, lower alkyl or lower alkoxy; and Z is selected from the group consisting of hydrogen, lower alkyl, alkali metal, alkaline earth metal, dibenzylamine, and N,N-dibenzylethylenediamine; and acid addition salts thereof.

2. A compound in accordance with claim 1 of the formula H N C R What is claimed is:-

l. A compound of the formula:

O v H 5 CH3 S CHa CH CHC-NH-( N J l C H;; H N C002 5 TH /7 N CH 0 CH2 '0 C002 0 H O H 5. A compound in accordance with claim 4 wherein Z is 7. A compound in accordance with claim 6 wherein 6. A compound in accordance with claim 1 of the for- Z is mula UNITED STATES PATENT AND TRADEMARK OFFICE CERTIFICATE OF CORRECTION PATENT NO. 3 ,905,955 DATED Sept. 16, 1975 |NVENTOR(S) 1 B. K. Lee et al.

ii is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Col. 6, line 67 "Pseudomanas" should read -Pseudomonas.

Col. 8, line 11, "methy" should read methylene] Col. 9, example 4, in the structure, "C/HO" should read --CIIHO Col. 9, example 5, in the structure, "CHO" should read C|IHO Col. 9, example 6, in the structure, "C/HO" should read Col. 9, example 8, in the structure, "CHO" should read -('IHO Signed and Sealed this seventeenth Day Of Februa ry1976 [SEAL] Attest:

RUTH C. MASON C. MARSHALL DANN Arresting Officer Commissioner oj'larenrs and Trademarks 

1. A COMPOUND OF THE FORMULA:
 1. A compound of the formula:
 2. A compound in accordance with claim 1 of the formula
 3. A compound in accordance with claim 1 of the formula
 4. A compound in accordance with claim 1 of the formula
 5. A compound in accordance with claim 4 wherein Z is Na.
 6. A compound in accordance with claim 1 of the formula 